A replacement limb that moves, feels and responds just like flesh and blood. It's the holy grail of prosthetics research. The Pentagon's invested millions to make it happen. But it's been elusive - until, quite possibly, now.

With prosthetic limbs designed to look like a human foot, wearing a shoe is no problem. But the unique shape of those carbon fibre prosthetic blades worn by athletes obviously can't accommodate a traditional shoe, so Nike invented a new one.

Using rapid prototyping techniques like 3D scanners and printers, Scott Summit's company brings self-esteem back to those who've suffered a limb loss with custom designed coverings that turn prosthetics into stunning pieces of art.